In article .com,
Just Another Theremin Fan wrote:
It's normal for most equipment with switching power supplies to have
some relatively studly capacitors across the AC line, center tap to
chassis.

Not in the UK it's not! All equipment fitted with 2 pin plugs must be
double insulated
for exactly this reason. One leaky cap' could make any metal lethal.

I can assure you it is common. But the amount of current leaked to the
chassis and accessed via a phono socket screen etc is too small to be a
risk. But you can still feel it under certain conditions.

--
*A snooze button is a poor substitute for no alarm clock at all *

Dave Plowman London SW
To e-mail, change noise into sound.